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Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP
Alternative TitleStrain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP
Yan Ying1; Qi Yue1; Chen Lijia1; Li Xiaowu1
2016
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume26Issue:4Pages:966-973
AbstractTo explore the effect of strain rate (epsilon) over dot on the high temperature deformation characteristics of ultrafine-grained materials, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates (epsilon) over dot were systematically studied through compression tests and microscopic observations. The increase in (epsilon) over dot eliminates strain softening at T = 473 K and secondary SBs basically disappear at 1x10(-3) s(-1); however, at 1x10(-2) s(-1), cracks are only observed at temperature below 473 K, and secondary SBs become clearer at T >= 473 K. The microstructures of ECAP-treated Al mainly consist of sub-grains (SGs). The increase in (epsilon) over dot inhibits the SG growth, thus leading to the increases both in yield strength and flow stress at high temperatures.
Other AbstractTo explore the effect of strain rate e& on the high temperature deformation characteristics of ultrafine-grained materials, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates e& were systematically studied through compression tests and microscopic observations. The increase in ? eliminates strain softening at T≤473 K, and largely enhances the yield strength and flow stress at 473-573 K. The shear deformation dominates the plastic deformation of ECAP-treated Al. Many cracks along shear bands (SBs) are formed at T≥473 K and secondary SBs basically disappear at 1×10~(-3) s~(-1); however, at 1×10~(-2) s~(-1), cracks are only observed at temperature below 473 K, and secondary SBs become clearer at T≥473 K. The microstructures of ECAP-treated Al mainly consist of sub-grains (SGs). The increase in ? inhibits the SG growth, thus leading to the increases both in yield strength and flow stress at high temperatures.
KeywordRATE SENSITIVITY MECHANICAL-PROPERTIES BEHAVIOR COPPER CU ALLOY AL MICROSTRUCTURE FEATURES METALS equal channel angular pressing (ECAP) pure Al strain rate high temperature compression deformation damage microstructure
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China]
CSCD IDCSCD:5702929
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/144471
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.上海市地震局
Recommended Citation
GB/T 7714
Yan Ying,Qi Yue,Chen Lijia,et al. Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(4):966-973.
APA Yan Ying,Qi Yue,Chen Lijia,&Li Xiaowu.(2016).Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(4),966-973.
MLA Yan Ying,et al."Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.4(2016):966-973.
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